usb: dwc3: of-simple: Add compatible for Allwinner H6 platform

Add compatible string to use this generic glue layer to support
Allwinner H6 platform's dwc3 controller.
Signed-off-by: NIcenowy Zheng <icenowy@aosc.io>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc3/dwc3-of-simple.c

@@ -215,6 +215,7 @@ static const struct of_device_id of_dwc3_simple_match[] = {
 	{ .compatible = "sprd,sc9860-dwc3" },
 	{ .compatible = "amlogic,meson-axg-dwc3" },
 	{ .compatible = "amlogic,meson-gxl-dwc3" },
+	{ .compatible = "allwinner,sun50i-h6-dwc3" },
 	{ /* Sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, of_dwc3_simple_match);